NINE YEARS AGO, when my oldest son was in kindergarten, his 6.5-hour school day included just 15 minutes of outdoor recess. That paltry interval was typical of our Minnesota public-school district. Worse, bad weather periodically meant that kids were kept inside to play, sometimes on screens. By first grade, our five-year-old, who was brimming with energy he should have burned through on the playground, started getting in trouble for wrestling his classmates. His punishment: staying inside during recess.
I still get angry when I think about all this, because it was clear then, as it is now, that time outdoors is good for children’s physical and mental health. In recent years, the evidence has only increased: studies consistently show that getting outside boosts kids’ test scores, reduces stress, and improves…
